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Note for Computer Organistaion - CO By vtu rangers

  • Computer Organization - CO
  • Note
  • Visvesvaraya Technological University Regional Center - VTU
  • 26 Topics
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Subject code 15CS34 Subject Sowmya K P Asst. Professor Dept of ISE CITech

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MODULE 1: Basic structure of computer & Machine instructions and programs Courtesy: Text book: Carl Hamacher 5th Edition Subject

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Functional Units Arithmetic and logic Input Memory Output Control I/O Processor Figure 1.1. Basic functional units of a computer.

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Basic operational concepts : A Typical Instruction • Add LOCA, R0 • Add the operand at memory location LOCA to the operand in a register R0 in the processor. • Place the sum into register R0. • The original contents of LOCA are preserved. • The original contents of R0 is overwritten. • Instruction is fetched from the memory into the processor – the operand at LOCA is fetched and added to the contents of R0 – the resulting sum is stored in register R0.

Lecture Notes